Simon's clearly not quite used to addressing so many people, but he goes through the motions as best he can, covering the following topics:

1) Myths and misconceptions of space radiation. Spoiler alert: it is not slowly killing you don't worry.

2) Basic wound care and why antiseptic is important and why we don't use leeches anymore.

3) An overview of how to use the automated medical equipment.

4) A gentle reminder that if something is wrong, to see a doctor.

Afterwards, he makes himself available for questions. If you ever wanted to ask a medical professional about space radiation, now is your chance.